Apparatus for controlling the unwinding of yarn.



A T'. A. a. H. A. BOYD. APPARATUS FOR CONTROLVLING THE UNWINDING 0F YARN.

APPucMloN man umts. 191s.

Patented Sept. 3, 1918.

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i 'APPARATUS FOB CONTROLLING THE UNWINDING OF YARN.

Specification of Letters Patent.

Patented Sept. 3, 1918.

Application filed March 25, 1918. y Serial No. 224,600.

To all whom t may concern Be it known that we, THOMAS ALEXANDER yBOYD and HAROLD ARTHUR BOYD, subjects of the King of the United King-dom of Great Britain and Ireland, and both residing at Shettleston, Glasgow, Scotland, haveV invented a certain new and useful improvement in Apparatus for Controlling the Unwinding of Yarn, of which kthe following is a specification.

rllhis invention refers to apparatusif'or controlling the unwinding of yarn from a hank carried upon a reel.

According' to the invention the reel is so mounted and means are provided for applying drag thereto in such wise that upon an undue strain being put upon the yarn the drag upon the reel will be relieved wholly or partially so that there will be less liability to breakage of the yarn.

Figure 1 of the accompanying drawings is a side elevation of a reel in a swing holder. Fig. 2, is a side elevation of a reel in a fixed holder.

Referring to Fig. 1, 1 denotes the axle of a reel 2 carrying a hank 3 of thread or yarn. 4 denotes a brake wheel shownl as mounted on the axle 1 though it may be mounted on the reel boss.

axle 1 running freely in a gab 5 formed at the top of each limb of the U-shaped bracket On each of the outer sides of the U- shaped bracket is formed a V-shaped projection 52 at some distance below the axle 1. On a rail G, which is part of the framing of a Winding machine, is mounted horizontally and at right angles to said rail a pairv of arms 7 at the free end of each of which is formed a V-shaped gab 7. These arms 7 receive the U-shaped bracket 5, the projections 52 resting in the gabs 7. Behind the brake wheel 4 is fixed on one of the arms 7 a brake S covered with flannel or like material. On the opposite side of' the reel to that on which is the fixed brake is mounted a rod 9 parallel with the axis of the reel 2 at a suitable distance from the reel and preferably at a higher level than the axis of' the reel. Y

The bracket 5 is free to swing on the gabs 7 and is controlled by a counterweight 1() which presses the brake wheel 4 against the fixed brake 8.

1t will be evident that when the thread is being drawn from the reel over the rod 9 in The reel 2 is mounted in av vertical U-shaped bracket 5 or cradle; the` front,` any undue strain 0n the yarn will withdraw the brake wheel 4 'partially kor wholly ofi the fixed brake 8 and thus relieve the dragon the yarn, and that, if the tension be relieved, the brake wheel 4 will fall back against the fixed brake 8 and the yarn will receive drag as previously. By means vof an adjusting screwV 11 the bracket 5 and reel 4 are prevented from being drawn by the yarn too far from the fixed brake 8 so .thatl with the relief of undue tension on the yarn the fixed brake may at once act.

ln Fig. 2, 2 denotes a reel, 3 a hank of i yarn and 4 a brake wheel as described with reference to Fig. 1. The reel 2 is mounted between a pair of vertical 'stands 12 each having a gab 12 at the upper end, the axle 1 of the reel 2 resting on the gabs 12. rThe gabs 12 are made wider than the diameter of the axle and with a slight incline as shown by dotted line 13 so that the axle will normally lie near the lower end of the gabs 12. Behind the gabs 12 is fixed on one of the vertical stands 12 a brake 14 as described in connection with Fig. 1 and this brake 14 is so adjusted that the brake wheel 4 of the reel rests against the brake 14 and not against the back of the adjacent gab 12. The gabs 12, as also the gabs 7, aiord mouths or openings from the bottom walls of which the reels are removably supported. Gn the side of the reel opposite to thc fixed brake is fixed at a suitable height a rod 9 parallel with the axle 1 of the reel 2. The yarn from the hank is drawn over the rod 9 to the winding mechanism. `When any undue strain comes upon the yarn, the reel 2, being free to move slightly away from the fixed brake 14, is relieved from the latter. As soon as the undue strain on the yarn is relaxed, the reel will resume its contact with the fixed brake.

TWhat we claim is 1. Forcontrolling the unwinding of yarn, in combination, a bank-carrying reel rotatable in paying out the yarn, a brake-wheel rotatable with said reel, a fixed brake against which said brake wheel normally rests, and a mount for said reel and said brake reel including gabs from the bottom walls of which said reel and brake wheel ing a rotatable bank-carrying reel, eongxbincd with a brake-wheel rotatable with said reel,

a xed brake' with which said brake-wheel is normally in contact, a yarn guide on the side of said reel opposite said brake and arranged above the axis of said reel so that an uuusual tension on the yarn guided by said guide Will move said brake-Wheel away from said brake, a pivoted support for said ieel and brake wheel, a eounterweight on said pivoted support7 and a stop for limiting the swinging movements offsaid support when it is displaced by unusual tension ou the yarn7 said pivoted support being returned to its normal position by said counterweight when the unusual tension is relieved. f

8. For controlling the unwinding of yarn from a hanl, in combina-tion, a hank-carryingieel, a brake-wheel rotatable with said reel,` a fixed brake against which said brakewheel normally rests, and a pendulus support for said reel and brake-wheel, said supportl being pivoted on4 an axis parallel to and in substantially the same Vertical plane as the axis of said reel and brake-Wheel, and being adapted to permit movement of said reel and brake-wheel in an arcuate path away from said fixed brake when the yarn is subjected to undue strain.

In testimony whereof we have signed oui` names to this specification in the prosenceot two subscribing` witnesses.

' T. A. BOYD.

H. A. BOYD. Witnesses VALLAGE CRANsToN FAIRWEATHER.

HENRY MASON.

Copies of this patent may be obtained fiorve cents each, by addressing the Commissioner of Patents,

' Washington, D. 0. 

